Protection apparatus for galvanometer laser system and operating method thereof

Abstract

The present disclosure provides a protection apparatus for a galvanometer laser system, including a system constituted by a galvanometer motor and a laser, wherein the apparatus further includes a protection device, the protection device including a monitoring element and a control element; wherein the monitoring element includes a current monitoring module configured to monitor an operating current of the system, a position monitoring module configured to monitor a swing position of the galvanometer motor, and a temperature monitoring module configured to monitor an operating temperature of the galvanometer motor; the control element includes a signal control module connected to a signal input terminal of the system, a laser switch module connected to the laser, and a galvanometer drive module connected to the galvanometer motor, a predetermined output signal being transmitted via the signal control module to the system; and based on various monitoring data of the monitoring element.

What is claimed is: 
     
       1. A protection apparatus for a galvanometer laser system, comprising a system constituted by a galvanometer motor and a laser, wherein the apparatus further comprises a protection device, the protection device comprising a monitoring element and a control element; wherein the monitoring element comprises a current monitoring module configured to monitor an operating current of the system, a position monitoring module configured to monitor a swing position of the galvanometer motor, and a temperature monitoring module configured to monitor an operating temperature of the galvanometer motor; the control element comprises a signal control module connected to a signal input terminal of the system, a laser switch module connected to the laser, and a galvanometer drive module connected to the galvanometer motor, a predetermined output signal being transmitted via the signal control module to the system; and based on various monitoring data of the monitoring element, the signal control module is enabled to control on or off of an output signal, the laser switch module is enabled to control on or off of the laser, and the galvanometer drive module is enabled to control on or off of the galvanometer motor. 
     
     
       2. The protection apparatus for the galvanometer laser system according to  claim 1 , wherein the control element comprises a display module; wherein the display module is configured to display the various monitoring data of the monitoring element and various control actions of the control element. 
     
     
       3. The protection apparatus for the galvanometer laser system according to  claim 1 , wherein the protection device further comprises a microprocessor; wherein an acquisition terminal of the microprocessor is connected to the monitoring element, and a control terminal of the microprocessor is connected to the control element. 
     
     
       4. An operating method of the protection apparatus for the galvanometer laser system as defined in  claim 1 , wherein in the case that the system is in a normal operating state, the protection device is provided with a current protection mode, a temperature protection mode, and a position protection mode; wherein
 in the current protection mode, in the case that the current monitoring module monitors that the operating current is abnormal, the current protection mode is triggered; 
 in the temperature protection mode, in the case that the temperature monitoring module monitors that the operating temperature is abnormal, the temperature protection mode is triggered; 
 in the position protection mode, in the case that the position monitoring module monitors that the swing position is abnormal, the position protection mode is triggered; and 
 in the case that any of the protection modes is triggered in the system, the control element of the protection device performs a corresponding control action. 
 
     
     
       5. The operating method of the protection apparatus for the galvanometer laser system according to  claim 4 , wherein in the current protection mode, three levels of current monitoring intervals that are successively increasing are defined; wherein
 in the case that the current monitoring module monitors within a unit time period that the operating current is within a second-level current monitoring interval, the operating current is abnormal, and the current protection mode is triggered; and within a predetermined trigger time period t1, the signal control module controls the output signal transmitted to the system to decrease to a predetermined first signal value, and the other modules of the control element maintain an original state; 
 in the case that the current monitoring module monitors within a unit time period that the operating current is within a third-level current monitoring interval, the operating current is abnormal, and the current protection mode is triggered; and within a predetermined trigger time period t1, the signal control module interrupts transmission of the output signal to the system, the laser switch module turns off the laser, and the galvanometer drive module maintains an original state; and 
 each time the predetermined trigger time period t1 expires, the active current protection mode is exited, and the control element of the protection device resumes to the original state, and the current monitoring module resumes monitoring the operating current. 
 
     
     
       6. The operating method of the protection apparatus for the galvanometer laser system according to  claim 5 , wherein the three levels of current monitoring intervals comprise: a first-level current monitoring interval (0, 100%], the second-level current monitoring interval (100%, 150%], and the third-level current monitoring interval (150%, +∞). 
     
     
       7. The operating method of the protection apparatus for the galvanometer laser system according to  claim 4 , wherein in the temperature protection mode, four levels of temperature monitoring intervals that are successively increasing are defined; wherein
 in the case that the temperature monitoring module monitors in real time that the operating temperature is within a second-level temperature monitoring interval, the operating temperature is abnormal, and the temperature protection mode is triggered; and within a predetermined trigger time period t2, the signal control module controls the output signal transmitted to the system to decrease to a predetermined first signal value, the other modules of the control element maintain an original state, and the temperature monitoring module constantly monitors the operating temperature in real time; 
 in the case that the temperature monitoring module monitors in real time that the operating temperature is within a third-level temperature monitoring interval, the operating temperature is abnormal, and the temperature protection mode is triggered; and within a predetermined trigger time period t2, the signal control module interrupts transmission of the output signal to the system, the laser switch module turns off the laser, the galvanometer drive module maintains an original state, and the temperature monitoring module constantly monitors the operating temperature in real time; or 
 in the case that the temperature monitoring module monitors in real time that the operating temperature is within a fourth-level temperature monitoring interval, the operating temperature is abnormal, and the temperature protection mode is triggered; and the signal control module interrupts transmission of the output signal to the system, the laser switch module turns off the laser, the galvanometer drive module turns off the galvanometer motor, and the system is turned off and restarted; and 
 each time the predetermined trigger time period t2 expires, the active temperature protection mode is exited, and the control element of the protection device resumes to the original state, and the temperature monitoring module monitors the operating temperature in real time. 
 
     
     
       8. The operating method of the protection apparatus for the galvanometer laser system according to  claim 4 , wherein in the position protection mode, a rated swing interval is predefined; wherein in the case that the position monitoring module monitors in real time that the swing position exceeds the rated swing interval, the swing position is abnormal, the position protection mode is triggered, within a predetermined trigger time period t3, the signal control module controls the output signal transmitted to the system to decrease to the predetermined first signal value, and the other modules of the control element maintain an original state; and each time the predetermined trigger time period t3 expires, the active position protection mode is exited, the control element of the protection device resumes to an original state, and the position monitoring module resumes monitoring the swing position. 
     
     
       9. The operating method of the protection apparatus for the galvanometer laser system according to  claim 4 , wherein in initial start of the system, the position monitoring module and the temperature monitoring module of the protection device pre judge whether monitoring data of the operating temperature and the swing position are acquired; wherein in the case that the monitoring data of the operating temperature and the swing position is normally acquired, the signal control module controls the output signal to be normally transmitted to the system, the laser switch module turns on the laser, the galvanometer drive module turns on the galvanometer motor, and the system resumes to a normal operating state; and in the case that any of the monitoring data fails to be normally acquired, the signal control module interrupts transmission of the output signal to the system, the laser switch module turns off the laser, and the galvanometer drive module turns off the galvanometer motor. 
     
     
       10. The operating method of the protection apparatus for the galvanometer laser system according to  claim 4 , wherein in normal operating of the system, in the case that any of monitoring data of the operating current, the swing position, and the operating temperature fails to be acquired, the signal control module interrupts transmission of the output signal to the system, the laser switch module turns off the laser, and the galvanometer drive module turns off the galvanometer motor.